Friday's Tech Winners & Losers

MEMC Electronics Materials climbs on a fourth-quarter earnings beat.

Shares of Technitrol ( TNL) slumped 14% after the producer of electronic components posted disappointing fourth-quarter results and warned that first-quarter revenue would be below forecasts. The company posted earnings of $14.4 million, or 35 cents a share, on revenue of $236.1 million. Excluding items, the company earned 40 cents a share. Analysts expected earnings of 45 cents a share on revenue of $245.8 million. During the year-earlier period, the company earned $7.8 million, or 19 cents a share, on revenue of $184.5 million. Excluding items, the company earned 29 cents a share during the year-earlier period.

PLX Technology ( PLXT) tumbled 12% after the chipmaker posted disappointing fourth-quarter earnings and warned that first-quarter revenue would be below expectations. The company earned $162,000, or a penny a share, on revenue of $21 million. Analysts expected earnings of 9 cents a share on revenue of $21 million. During the year-earlier quarter, the company earned $35,000, or less than a penny a share, on revenue of $15.3 million.